| 不整合分析及其在陆相盆地构造研究中的意义 |
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| 引用本文： | 陈发景,张光亚,陈昭年.不整合分析及其在陆相盆地构造研究中的意义[J].现代地质,2004,18(3):269-275. |
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| 作者姓名： | 陈发景 张光亚 陈昭年 |
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| 作者单位： | 1. 中国地质大学,能源地质系,北京,100083
2. 中国石油天然气总公司,石油勘探开发研究院,北京,100083 |
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| 摘 要： | 讨论了3个问题,即不整合分析及其在研究陆相盆地的形成和演化中的意义;不整合分析及其与构造运动和盆地改造的关系;与不整合有关的圈闭类型。通过上述的不整合分析,可以获得以下结论:正旋回地层的超覆(或上超)是在拉张或中性构造背景中产生的,而反旋回地层的退覆和削截—不整合则是在挤压构造环境中发育的;复合递进型同构造不整合与内陆前陆盆地边缘挤压隆起的加速和减速上升有关。根据不整合面下被削截岩层的构造变形和侵蚀厚度可以推断出由构造运动所造成的盆地改造程度和与不整合有关的地层圈闭类型。
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| 关 键 词： | 超覆 退覆 削截 递进型同构造不整合 构造运动 与不整合有关的地层圈闭类型 |
| 文章编号： | 1000-8527(2004)03-0269-07 |
| 修稿时间： | 2004年1月5日 |
UNCONFORMITY ANALYSIS AND ITS SIGNIFICANCE IN THE STUDY OF CONTINENTAL BASIN TECTONICS |
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| CHEN Fa-jing,ZHANG Guang-ya,CHEN Zhao-nian.UNCONFORMITY ANALYSIS AND ITS SIGNIFICANCE IN THE STUDY OF CONTINENTAL BASIN TECTONICS[J].Geoscience——Journal of Graduate School,China University of Geosciences,2004,18(3):269-275. |
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| Authors: | CHEN Fa-jing ZHANG Guang-ya CHEN Zhao-nian |
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| Institution: | CHEN Fa-jing~1,ZHANG Guang-ya~2,CHEN Zhao-nian~1 |
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| Abstract: | Three topics are discussed in this paper as follows:(1)unconformity analysis and its significance in the study of basin formation and evolution;(2)unconformity analysis and its relation with intensity of tectonic movement and basin modification;(3)types of stratigraphic traps related with unconformities. From above mentioned discussions, it is concluded that:(1)normal cycle and onlap above unconformity were occurred at extensional and neutral tectonic settings, whereas reverse cycle, offlap and truncation unconformity were developed at compressional tectonic environments;(2)composite, progressive and syntectonic unconformities are related to accelerated and lessened uplifts in the margin of intracontinental foreland basins;(3) based on the structural deformations below truncation unconformities and eroded thickness of strata, the degree of basin modification resulted from tectonic movement, and the types of stratigraphic traps related to unconformities can be recognized. |
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| Keywords: | onlap offlap truncation composite progressive and syntectonic unconformity tectonic movement stratigraphic trap related to unconformity |
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